Crop husbandry.

1. Over a period of six years seven field experiments were carried out to study the effect of the time of application of sulphate of ammonia to autumn-sown wheat.2. Three experiments were located on light gravelly soil which had been farmed highly for some years, and in those three cases sulphate of ammonia decreased yield, irrespective of time of application; the reduction in yield was of the order of 10 per cent. and is ascribed to more lodging and greater incidence of “foot-rot”.3. Three experiments were located on heavy clay soil in poor condition; in these sulphate of ammonia gave percentage increases in yield of 18, 20 and 7.4. Evidence is produced that early dressings of sulphate of ammonia do not affect germination or plant establishment, but that they tend to increase tiller formation by the end of February.

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Introduction to crop husbandry, including grassland

Field Crops Research ◽

10.1016/0378-4290(85)90066-8 ◽

1985 ◽

Vol 12 ◽

pp. 189

Author(s):

P.H. Graham

Keyword(s):

Crop Husbandry

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Nematodes in relation to plant growth. I. The nematode distribution pattern of typical farms and nurseries.

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v7i4.17670 ◽

1959 ◽

Vol 7 (4) ◽

pp. 327-343

Author(s):

P. Kleyburg ◽

M. Oostenbrink

Keyword(s):

Plant Growth ◽

Distribution Pattern ◽

Soil Type ◽

Starting Point ◽

Crop Husbandry

The distribution of nematodes in fields on ten farms was influenced by soil type, cropping and manuring. The total number of active nematodes per 100 ml. of soil ranged from 1, 005 to 16, 105 with an average of 3, 004. Known and suspected phytophagous nematodes ranged from 120 to 3, 510 per 100 ml. of soil with an average of 909. The prevalent phytophagous genera were Heterodera, Paratylenchus, Pratylenchus, Rotylenchus, Tylenchorhynchus and Meloidogyne. The authors suggest that such surveys are a starting point for further research into several obscure crop husbandry problems. H. R. Wallace. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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