Fertilizing Gardens in South Dakota

Gardens can provide high quality vegetables, fruits, and flowers if the crops are given adequate nutrients and water and insect, weed, and disease control. This fertilizer guide covers part of your garden\u27s needs-optimum nutrients for yield and quality of garden plants

Crop Nutrient Considerations for Wet or Flooded Fields

Many South Dakota fields have standing water with saturated soil conditions this spring. These wet soil conditions can have implications for existing soil nutrients and for nutrients applied for this season

Nitrogen Requirements of Crops

Nitrate Nitrogen (NO₃-N) in the top 2 ft of soil is normally used as efficiently by crops as fertilizer nitrogen. Therefore when nitrogen fertilizer recommendations are made, the NO₃-N soil test level is subtracted from the total nitrogen requirement of the crop. The nitrogen required by most crops grown in South Dakota has been determined by extensive field calibration studies over the past 20 years by SDSU soils researchers (Table 1)

Fertilizing for Grass Seed Production

Seed production from grass is highly dependent upon favorable moisture and good soil fertility. Both moisture and fertility must be present; one does little good without the other. A good grass seed crop needs about the same amounts of nutrients as either corn or oats. Table 1 shows relative comparisons of nutrients taken up by comparable-yielding crops. Successful grass seed production also requires an adequate stand, weed control, and use of adapted varieties. These are discussed in C 244, Grass Seed Production: Guidelines, available from your county Extension agent

Transcription of Nonrepeated DNA in Neonatal and Fetal Mice

The transcription of nonrepeated DNA sequences was measured by hybridization of RNA from neonatal and fetal mice to mouse DNA using three different techniques. The measurements indicate that a large part (about 70%) of the rapidly-labeled fetal RNA is transcribed from nonrepeated DNA sequences. It appears that more than 12% of the single-copy DNA sequences are represented in the RNA of newborn mice

Spatially resolved spectra of 3C galaxy nuclei

We present and discuss visible-wavelength long-slit spectra of four low redshift 3C galaxies obtained with the STIS instrument on the Hubble Space Telescope. The slit was aligned with near-nuclear jet-like structure seen in HST images of the galaxies, to give unprecedented spatial resolution of the galaxy inner regions. In 3C 135 and 3C 171, the spectra reveal clumpy emission line structures that indicate outward motions of a few hundred km s$^{-1}$ within a centrally illuminated and ionised biconical region. There may also be some low-ionisation high-velocity material associated with 3C 135. In 3C 264 and 3C 78, the jets have blue featureless spectra consistent with their proposed synchrotron origin. There is weak associated line emission in the innermost part of the jets with mild outflow velocity. These jets are bright and highly collimated only within a circumnuclear region of lower galaxy luminosity, which is not dusty. We discuss the origins of these central regions and their connection with relativistic jets.Comment: 15 pages incl Tables, 12 diagrams, To appear in A