Sulphur nutrition of pastures and crops Phosphorus and potassium nutrition of pastures on deep sands in the high rainfall areas

CONTENTS A. SULPHUR 1. Sources, rates, time of application of sulphur to legume pastures (high rainfall) - 80AL1, 80AL4, 80MA1, 80KE1. 2. Sulphur soil test on pastures (high rainfall) - 80AL12, 80AL13, 80AL14, 80BY2, 80KE2. 3. Sulphur rundown on sulphur absorbing soils of the high rainfall areas - 80BY1. 4. Sulphur requirements of pasture in low rainfall areas - 80JE17, 80M020. 5. Residual value of 1979 applied sulphur. Rates of fine gypsum applied 1980 - 79AL2, 79AL18, 79AL22, 79AL23, 79AL25, 79AL41, 78BA8 B, 79BY3, 79BY4, 79HA2, 79KE3, 79KE7, 79M020. 6. Sulphur requirements of wheat - 80JE16, 80M09. B. PHOSPHORUS 7. Sources, rates, time of application of phosphorus to legume pastures - 80AL2, 80AL5, 80AL15, 80MA2. C. POTASSIUM 8. Sources, rates, time of application of potassium to legume pastures - 80AL3, 80AL6, 80MA3. D. SLOW RELEASE P,S,K FERTILIZERS - 1979 TRIALS 9. Phosphorus sulphur and potassium slow release fertilizers on pastures 1980 results - 79AL1, 79KE2, 79MA2. E. APPENDIX P.R.D./Albany Regional Office PKS collaborative trials, sulphur results. (sulphur soil test on pastures) - 80AL44, 80AL46, 80AL47, 80AL72

Sulphur nutrition of pastures and crops, Phosphorus and potassium nutrition of high rainfall pastures on deep sands, Soil acidity - high rainfall pastures

A. SULPHUR - HIGH RAINFALL 1. Rates and time of application of superphosphate to pastures. 79AK2, 79AL23, 79AL25, 79AL41, 81BY1, 81KE1. 2. Sulphur soil test calibration on pastures. 79AL18, 80BY2, 80KE2. 3. Sulphur soil test calibration on pastures: Co-operative PKS soil test project on pastures on duplex soils of the east Albany area (PRD/ARO). Sulphur results. 80 AL44, 46, 47, 48, 72, 73 81AL51, 53, 55 4. Sulphur on adsorbing soils receiving no current S input. 80BY1., 80AL16. 5. Sources, rates, time of application of sulphur on pastures. 80AL1, 80AL4, 81AL3, 81AL4, 80KE1, 80MA1 B. SULPHUR - LOW RAINFALL 1. Sulphur on pastures. 80JE17, 80M020. 2. Sulphur on cereals 80JE16, 80M09. C. PHOSPHORUS 1. Sources, rates time of application of phosphorus on high rainfall pastures on deep sands. 79AL1, 80AL2, 80AL5, 80AL15, 81AL5, 81AL6, 81KE2, 79MA2, 80MA2, 81MA4. D. POTASSIUM 1. Sources, rates, time of application of potassium on high rainfall pastures on deep sand. 80AL3, 80AL6, 81AL7, 81AL8, 81MA3. E. SOIL ACIDITY 1. High rainfall soil pH survey - 2. Lime on old lan·d pastures (high 81AL10, 81ALll, 81AL12, 81AL13, Albany Region - Summary rainfall) 81AL14, 81AL15, 81AL16 3. Topdressed vs incorporated lime on new land acid peat. 81AL9 4. Lime on new land pastures: 1981 results from 1979-80 commenced trials by Albany Regional Office staff. 79AL14, 79AL16, 80AL50, 80AL51, 80AL52, 80AL53, 80AL54

The effects on plant growth

The level of acidity of a soil reflects its chemical and sometimes its biological condition. Changes in acidity mean changes in the availability to plants of some soil elements, and modifications to the biological processes in the soil. Some elements become more available to plants in acis soils, and in some soils particular elements can reach toxic levels. Other elements can be effected in the opposite way: deficiencies can develop in acid conditions. It is important to realise, however, that the chemical nature of all soils varies. Beccause of these variations, acidity can affect each soil differently and thus influence plant growth differently

Sulphur nutrition of pastures. Potassium nutrition of high rainfall pastures on deep sands

A. Sulphur - High Rainfall – 80AL1, 80AL4 (1980), 80AL4 B (established 1983). Sulphur rundown on heavy soils - 80BY1. Sources, rates, time of application of sulphur to pastures - 80AL1, 80AL4, 80AL4B. Sources, rates, time of application of sulphur to legume pastures – 80AL1, 80AL4, 80AL4B. Sulphur nutrition of pastures. 83PE36. B. Sulphur - Low Rainfall – 82AL9, 80JE16/17 82KA4. Sulphur on pastures - 80JE16/17, 82AL9, 82KA4. Sulphur on absorbing soils receiving no current S input – 80BY1. C. Potassium. Sources, rates, time of application of potassium on high rainfall deep sand pastures - 80AL3, 80AL6

1979 Phosphorus and sulphur interactions on pastures. Sulphur nutrition of pastures

Contents: Phosphorus and sulphur interactions on pastures. Sulphur nutrition of pastures. (i) Phosphorus x sulphur x times of application on pastures 1979: 79AL2, 79BY1, 79KE3, 79KE4. (ii) Sulphur status/soil tests on pastures: 79AL18, 79AL22, 79AL25, 79AL41, .79BY2, 79BY3, 79BY4, 79HA1, 79HA2, 79HA3, 79KE7, 79M020. (iii) Time of application of sulphur to pastures: 79BU1,79KE6. (iv) Phosphorus, sulphur and potassium fertilisers on pastures on deep leaching sands: 79AL1, 79KE2, 79MA2, 79MA6. (v) Phosphorus x sulphur interaction trials 1978; 1979 treatments: 78A7, 78BA8, 73B4, 78BU3, 78C4, 78MA2, 78M08, 78N04

Phosphorus and sulphur interactions, 1978.

Yield results, 78AL3, 78KE4, 78M08, 78BY3, 78BA8, 78BU3, 78N04, 78A7, 78C4, 78B4, 78MA2. Soil sampling data