08:00 Tue 05 Sep 2017
Harvest Minerals Ltd - Excellent Test Results from the Arapua Project
To view the press release with the photographs, please use the following link:
http://www.rns-pdf.londonstockexchange.com/rns/7555P_-2017-9-4.pdf
("Harvest" or the "Company")
Excellent Coffee Agronomic Test Results from the
Highlights
· Results of tests conducted over 180 days on juvenile (±1.5 year) and mature (+12 year) coffee plants indicate that KPfértil, a completely natural, slow release, single product fertiliser, is as effective as traditional fertilisers in supplying potassium ("K") and phosphate ("P") to plants
· As part of the test, a total of 12 treatments were applied to compare KPfértil to conventional fertilisers as a source of K and P
· Results are part of the ongoing agronomic efficiency study on the application of KPfértil on coffee crops
· Further tests will be conducted to examine the long-term benefits of using KPfértil over conventional fertilisers
Santinato & Santinato Cafés Ltda ('Santinato'), a renowned agronomic consulting company in
Harvest's Executive Chairman,
Further Information - Agronomic Efficiency Study in Coffee Crops
The purpose of the study is to compare the effects of applying KPfértil against conventional fertilisers as a source of K and P in both juvenile (±1.5 years old) and mature (+12 years old) coffee plants. A total of twelve treatments were applied to both the juvenile and mature coffee plants, being six for potassium (table 1) and six for phosphate (table 2).
Table 1 - Potassium Treatments Applied and dosages
Treatment |
Source |
Juvenile Coffee |
Mature Coffee |
Dose K2O (kg/ha) |
Dose K2O (kg/ha) |
||
1 |
Control (without K) |
0 |
0 |
2 |
KCl (conventional source of K) |
200 |
500 |
3 |
KPfértil (powder) |
200 |
500 |
4 |
KPfértil (powder) |
300 |
750 |
5 |
KPfértil (powder) + 5 t/ha coffee straw |
200 |
500 |
6 |
KCl + 5 t/ha coffee straw |
200 |
500 |
Table 2 - Phosphate Treatments Applied and Dosages.
Treatment |
Source |
Juvenile Coffee |
Mature Coffee |
Dose P2O5 (kg/ha) |
Dose P2O5 (kg/ha) |
||
1 |
Control (without P) |
0 |
0 |
2 |
Triple Superphosphate (TSP, a conventional source of P) |
80 |
150 |
3 |
KPfértil (powder) |
80 |
150 |
4 |
KPfértil (powder) |
120 |
225 |
5 |
KPfértil (powder) + 5 t/ha coffee straw |
80 |
150 |
6 |
TSP + 5 t/ha coffee straw |
80 |
150 |
After the treatments had been applied for 180 days, the coffee plants were harvested and submitted for biometric evaluation, which is one of the main indicators of agronomic efficiency. At this first stage the biometric measurements used were the offshoot length, the number of nodes and the internode length.
Please see the PDF attached for Figure 1: Treatment of KPfértil and coffee straw applied to juvenile coffee plants
Results
The detailed results of the test are contained in Tables 3 through 6 below.
These tests were conducted over a relatively short time frame of 180 days. However, even over this short time frame, it was demonstrated that there was no statistical difference in the biometric parameters between KPfértil and KCl at the 100% dose for both juvenile and mature coffee plants.
Table 3 - Biometric measurements for K from Juvenile Coffee Crops after 180 days trial.
Treatment |
Source |
Offshoot Length |
Number of Nodes |
Internode Length |
1 |
Control (without K) |
22,35 b |
6,67 b |
23,07 b |
2 |
KCl (conventional source of K) |
24,54 a |
7,49 a |
26,88 a |
3 |
KPfértil (powder) |
24,26 a |
7,58 a |
26,27 a |
4 |
KPfértil (powder) |
23,76 ab |
7,52 a |
25,75 ab |
5 |
KPfértil (powder) + 5 t/ha coffee straw |
24,03 a |
7,48 a |
24,47 ab |
6 |
KCl + 5 t/ha coffee straw |
23,73 ab |
7,51 a |
25,52 ab |
*The letters in each column signify which values (Means) are the same when using the Tukey test at 5% probability.
Table 4 - Biometric measurements for K from Mature Coffee Crops after 180 days trial.
Treatment |
Source |
Offshoot Length |
Number of Nodes |
Internode Length |
1 |
Control (without K) |
13,57 a |
4,44 ab |
32,54 a |
2 |
KCl (conventional source of K) |
14,46 a |
4,75 ab |
35,63 a |
3 |
KPfértil (powder) |
12,93 a |
4,3 b |
34,3 a |
4 |
KPfértil (powder) |
13,55 a |
4,53 ab |
35,48 a |
5 |
KPfértil (powder) + 5 t/ha coffee straw |
14,62 a |
4,84 a |
35,22 a |
6 |
KCl + 5 t/ha coffee straw |
14,47 a |
4,58 ab |
38,3 a |
*The letters in each column signify which values (Means) are the same when using the Tukey test at 5% probability.
Table 5 - Biometric measurements for P from Juvenile Coffee Crops after 180 days trial.
Treatment |
Source |
Offshoot Length |
Number of Nodes |
Internode Length |
1 |
Control (without P) |
23,3 a |
7,48 a |
24,33 a |
2 |
TSP (conventional source of P) |
24,13 a |
7,93 a |
24,28 a |
3 |
KPfértil (powder) |
24,03 a |
7,86 a |
24,99 a |
4 |
KPfértil (powder) |
23,53 a |
7,8 a |
24,98 a |
5 |
KPfértil (powder) + 5 t/ha coffee straw |
23,17 a |
7,74 a |
24,89 a |
6 |
TSP + 5 t/ha coffee straw |
24,34 a |
7,84 a |
25,37 a |
*The letters in each column signify which values (Means) are the same when using the Tukey test at 5% probability.
Table 6 - Biometric measurements for P from Mature Coffee Crops after 180 days trial.
Treatment |
Source |
Offshoot Length |
Number of Nodes |
Internode Length |
1 |
Control (without P) |
15,97 ab |
5,15 a |
30,28 ab |
2 |
TSP (conventional source of P) |
15,03 b |
5,0 a |
28,15 b |
3 |
KPfértil (powder) |
15,65 ab |
5,06 a |
28,78 ab |
4 |
KPfértil (powder) |
17,6 a |
5,44 a |
32,42 ab |
5 |
KPfértil (powder) + 5 t/ha coffee straw |
16,82 ab |
5,34 a |
32,69 a |
6 |
TSP + 5 t/ha coffee straw |
17,62 a |
5,47 a |
31,23 ab |
*The letters in each column signify which values (Means) are the same when using the Tukey test at 5% probability.
This announcement contains inside information for the purposes of Article 7 of EU Regulation 596/2014.
*ENDS*
For further information please visit www.harvestminerals.net or contact:
|
(Chairman) |
Tel: +61 8 9200 1847 |
(Nominated & Financial Adviser) |
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Tel: +44 (0)20 7409 3494 |
(Joint Broker) |
|
Tel: +44 (0)20 7878 3360 |
(Joint Broker) |
|
Tel: +44 (0)20 7382 8300 |
|
|
Tel: +44 (0)20 7236 1177 |
|
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Notes:
The Company has four assets at various stages of development and continues to explore other opportunities that fit its investment criteria.
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