We selected treatments 5 to 8 to test some of the crop rotation options (table 2).
1: Effects of preplant fallowing, crop rotation and fumigation on growth on 'Nemaguard' peach rootstock in microplot trials near Parlier.
05) in the organic matter fractions between land uses (continuous wheat, crop rotation, crop-pasture rotation, and pasture) but not the tillage treatments.
Colonisation of subterranean clover bioassay plants by AMF varied from 21 to 61%; it was lower in crop rotation (DD) soil and greater in crop-pasture (NT) and perennial pasture soil than in all other treatments (Fig.
In addition, the significant cultivation method (tillage and crop rotation
) x depth interaction for Pi fractions in the current study suggests that crop rotations
and tillage practices affected the distribution of inorganic P pools throughout the soil profiles.
They superimposed the multi-model average climate projections onto data from 15 to 17 years of experiments with three crop rotation
systems--wheat-fallow, wheat-corn-fallow, and wheat-corn-millet--to see how yields might be affected in the future.
c) There were no on-farm studies on the long-term residual effects of crop rotations
on soil properties.
She and colleagues found that CRP lands, pastures, and fields with crop rotations
had higher microbial populations and shifts in the community composition.
Archer has also used field-research information to assess the economic and ecological impacts of specific crop rotations
(for example, continuous corn, corn-soybean, and corn-soybean-spring wheat-alfalfa) and tillage systems (conventional tillage or ridge-, strip-, and no-till conservation systems).
The plots in the experiment that use crop rotation
have always raised the cotton yield some, but the rotations really improve yield when conservation tillage is used.
Because the disease lives in the soil and infects a myriad of plants, growers have limited options for using other crop rotations
to break the fungus' life cycle.
Farmers are beginning to see the benefits of crop rotations
and working these rotations into a conservation tillage system," he says.
Best of all, growers net more profit with new crop rotations
," he says.
Their experiment compared traditional crop rotations
with conventional tillage to 3-year rotations with conservation tillage.
has become a proven way to boost crop yields on the Ranft farm.